Dust/Chip Extraction; Working Advice; Maintenance And Cleaning - Bosch GFA 18-H Professional Notice Originale

OBJ_BUCH-3261-001.book Page 15 Friday, January 26, 2018 7:45 PM
Removing the Adapter (see figure J)
Remove the application tool.
Unlock the adapter in the direction and pull it off the
mounting 1.

Dust/Chip Extraction

 Dust from materials such as lead-containing coatings,
some wood types, minerals and metal can be harmful to
one's health. Touching or breathing-in the dust can cause
allergic reactions and/or lead to respiratory infections of
the user or bystanders.
Certain dust, such as oak or beech dust, is considered car-
cinogenic, especially in connection with wood-treatment
additives (chromate, wood preservative). Materials con-
taining asbestos may only be worked by specialists.
–Provide for good ventilation of the working place.
–It is recommended to wear a P2 filter-class respirator.
Observe the relevant regulations in your country for the mate-
rials to be worked.
 Prevent dust accumulation at the workplace. Dust can
easily ignite.
Operation
Starting Operation
Inserting the battery
Note: Use of batteries not suitable for the machine can lead to
malfunctions of or cause damage to the power tool.
Set the rotational direction switch 5 to the centre position in
order to avoid unintentional starting. Insert the charged bat-
tery 4 into the handle so that it can be felt to engage and faces
flush against the handle.
Selecting the operating mode drilling or hammer drilling
(see figure D)
Turn the selector switch for "drilling/hammer drilling" 8 to the
"drilling" position.
Reversing the rotational direction (see figure E)
The rotational direction switch 5 is used to reverse the rota-
tional direction of the machine. However, this is not possible
with the On/Off switch 6 actuated.
Right Rotation: For drilling and driving in screws, push the
rotational direction switch 5 left to the stop.
Left Rotation: For loosening and unscrewing screws and
nuts, press the rotational direction switch 5 through to the
right stop.
Setting the torque (see figure D)
With the torque presetting ring 2 the required torque setting
can be preselected in 15 steps. With the correct setting, the
insert tool is stopped as soon as the screw is screwed flush in-
to the material or when the adjusted torque is reached. The
safety clutch is deactivated in the "
drilling.
Select a higher setting or switch to the "
screwing screws.
Bosch Power Tools
Gear selection, mechanical
 Actuate the gear selector 3 only when the machine is at
a standstill.
Two speed ranges can be preselected with the gear selector
3.
Gear 1:
Low speed range; for screwdriving or for working with a large
drilling diameter.
Gear 2:
High speed range; for working with a small drilling diameter.
 Always push the gear selector through to the stop. Oth-
erwise, the machine can become damaged.
Switching On and Off
To start the machine, press the On/Off switch 6 and keep it
pressed.
The work light 7 illuminates when the On/Off switch 6 is lightly
or fully pressed and allows the illumination of the work area in
poor lighting conditions.
The worklight 7 will remain lit for approx. 10 seconds when
the On/Off switch 6 has been released.
To save energy, only switch the power tool on when using it.
Adjusting the Speed
The speed of the switched-on power tool can be variably ad-
justed, depending on how far the On/Off switch 6 is pressed.
Light pressure on the On/Off switch 6 results in a low rotation-
al speed. Further pressure on the switch results in an increase
in speed.

Working Advice

 Apply the power tool to the screw only when it is
switched off. Rotating tool inserts can slip off.
After longer periods of working at low speed, allow the ma-
chine to cool down by running it for approx. 3 minutes at max-
imum speed with no load.
For drilling in metal, use only perfectly sharpened HSS drill
bits (HSS=high-speed steel). The appropriate quality is guar-
anteed by the Bosch accessories program.
Before screwing larger, longer screws into hard materials, it is
advisable to predrill a pilot hole with the core diameter of the
thread to approx.
Hold the power tool only by the insulated gripping surfac-
es 11 and the auxiliary handle 9 when performing opera-
tions where the application tool could contact hidden wir-
ing or its own power cord. Contact with a "live" wire will also
make exposed metal parts of the power tool "live" and shock
the operator.

Maintenance and Cleaning

For safe and proper working, always keep the machine
and ventilation slots clean.
" position, e. g. for
After each use, clean the tool, the GFA 18-H, GHA FC2 ham-
mer adapter with tool holder, the ventilation slots of the pow-
" symbol when un-
er tool and the ventilation slots of the battery.
English | 15
2
/ of the screw length.
3
1 609 92A 3YJ | (26.1.18)